public class ThreadDemo1 {
    public static void main(String[] args) throws InterruptedException {
        Thread t = new Thread(() -> {
            for(int i = 0;i < 5;i ++) {
                System.out.println("我是一个线程，正在执行中...");
                try {
                    Thread.sleep(1000);
                } catch (InterruptedException e) {
                    throw new RuntimeException(e);
                }
            }

            System.out.println("线程执行结束！");
        });

        t.start();

        t.join();//让main线程等待t线程结束

        System.out.println("这是主线程，期望这个日志在t结束后打印");
    }
}
